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Article: U-Pb geochronology and Hf-Nd isotopic geochemistry of the Badu Complex, Southeastern China: Implications for the Precambrian crustal evolution and paleogeography of the Cathaysia Block

TitleU-Pb geochronology and Hf-Nd isotopic geochemistry of the Badu Complex, Southeastern China: Implications for the Precambrian crustal evolution and paleogeography of the Cathaysia Block
Authors
KeywordsBadu Complex
Precambrian Crustal Evolution
Reconstruction Of Cathaysia In Columbia
South China
Zircon U-Pb-Hf Isotope
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2012, v. 222-223, p. 424-449 How to Cite?
AbstractThe oldest rocks of the Cathaysia Block, South China, comprise the Badu Complex and Paleoproterozoic granites in the Wuyishan area (southern Zhejiang and northwestern Fujian Provinces). New zircon U-Pb ages, Hf isotopes and trace elements for metamorphic rocks from the Badu Complex, and bulk Nd-isotope compositions of these rocks and granites in the Wuyishan area provide important constraints on the Precambrian crustal evolution of the Cathaysia Block. Inherited cores of zircon grains from the metamorphic rocks are of magmatic origin, predominantly formed at ca 2.5 Ga, while overgrowth rims reflect two episodes of granulite-facies metamorphism related to collisional orogeny at 1.89-1.88 Ga and 252-234 Ma. The unimodal age distribution (∼2.5 Ga) of detrital zircons and the positive e{open}Hf(t) of most Neoarchean zircons suggest that the detritus of these sedimentary protoliths of the Badu Complex came from a proximal volcanic arc, and that they were deposited in an arc basin synchronously with ∼2.5 Ga volcanism. Zircon U-Pb ages and Hf-isotopes with whole-rock Nd isotopes suggest that the juvenile crust of the eastern Cathaysia Block was generated mainly at 2.5 Ga and 2.8 Ga, and minor at 3.5-3.3 Ga with some evidence for the generation at 3.7-3.6 Ga and ∼4.0 Ga. A strong ∼1.9 Ga orogeny and the 3.3-3.0 Ga thermal event only involved the reworking of older crust material. Paleoproterozoic (1.89-1.86 Ga) granitic magmatic activity and high-grade metamorphism in the eastern Cathaysia Block were synchronous with the assembly of the Columbia supercontinent. Using integrated geochronological, Hf-Nd isotopic and petrologic data as a "barcode", we compare the Cathaysia Block with other Paleoproterozoic orogens worldwide, and argue that its closest affinity is with the South Korean Peninsula and the Lesser Himalaya of NW India. Consequently, the eastern Cathaysia block, and the South Korean massif (as the united Cathay-South Korea terrane) was close to the Lesser Himalaya terrane in the Paleoproterozoic configuration of the Columbia supercontinent. The spatial linkage was maintained for ca 1 Ga, until the fragmentation of the Rodinia supercontinent during Neoproterozoic time. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/151323
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYu, JHen_US
dc.contributor.authorO'reilly, SYen_US
dc.contributor.authorZhou, MFen_US
dc.contributor.authorGriffin, WLen_US
dc.contributor.authorWang, Len_US
dc.date.accessioned2012-06-26T06:20:36Z-
dc.date.available2012-06-26T06:20:36Z-
dc.date.issued2012en_US
dc.identifier.citationPrecambrian Research, 2012, v. 222-223, p. 424-449en_US
dc.identifier.issn0301-9268en_US
dc.identifier.urihttp://hdl.handle.net/10722/151323-
dc.description.abstractThe oldest rocks of the Cathaysia Block, South China, comprise the Badu Complex and Paleoproterozoic granites in the Wuyishan area (southern Zhejiang and northwestern Fujian Provinces). New zircon U-Pb ages, Hf isotopes and trace elements for metamorphic rocks from the Badu Complex, and bulk Nd-isotope compositions of these rocks and granites in the Wuyishan area provide important constraints on the Precambrian crustal evolution of the Cathaysia Block. Inherited cores of zircon grains from the metamorphic rocks are of magmatic origin, predominantly formed at ca 2.5 Ga, while overgrowth rims reflect two episodes of granulite-facies metamorphism related to collisional orogeny at 1.89-1.88 Ga and 252-234 Ma. The unimodal age distribution (∼2.5 Ga) of detrital zircons and the positive e{open}Hf(t) of most Neoarchean zircons suggest that the detritus of these sedimentary protoliths of the Badu Complex came from a proximal volcanic arc, and that they were deposited in an arc basin synchronously with ∼2.5 Ga volcanism. Zircon U-Pb ages and Hf-isotopes with whole-rock Nd isotopes suggest that the juvenile crust of the eastern Cathaysia Block was generated mainly at 2.5 Ga and 2.8 Ga, and minor at 3.5-3.3 Ga with some evidence for the generation at 3.7-3.6 Ga and ∼4.0 Ga. A strong ∼1.9 Ga orogeny and the 3.3-3.0 Ga thermal event only involved the reworking of older crust material. Paleoproterozoic (1.89-1.86 Ga) granitic magmatic activity and high-grade metamorphism in the eastern Cathaysia Block were synchronous with the assembly of the Columbia supercontinent. Using integrated geochronological, Hf-Nd isotopic and petrologic data as a "barcode", we compare the Cathaysia Block with other Paleoproterozoic orogens worldwide, and argue that its closest affinity is with the South Korean Peninsula and the Lesser Himalaya of NW India. Consequently, the eastern Cathaysia block, and the South Korean massif (as the united Cathay-South Korea terrane) was close to the Lesser Himalaya terrane in the Paleoproterozoic configuration of the Columbia supercontinent. The spatial linkage was maintained for ca 1 Ga, until the fragmentation of the Rodinia supercontinent during Neoproterozoic time. © 2011 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamresen_US
dc.relation.ispartofPrecambrian Researchen_US
dc.subjectBadu Complexen_US
dc.subjectPrecambrian Crustal Evolutionen_US
dc.subjectReconstruction Of Cathaysia In Columbiaen_US
dc.subjectSouth Chinaen_US
dc.subjectZircon U-Pb-Hf Isotopeen_US
dc.titleU-Pb geochronology and Hf-Nd isotopic geochemistry of the Badu Complex, Southeastern China: Implications for the Precambrian crustal evolution and paleogeography of the Cathaysia Blocken_US
dc.typeArticleen_US
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_US
dc.identifier.authorityZhou, MF=rp00844en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.precamres.2011.07.014en_US
dc.identifier.scopuseid_2-s2.0-84872872240en_US
dc.identifier.isiWOS:000313765700022-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridYu, JH=15125142600en_US
dc.identifier.scopusauthoridO'Reilly, SY=7103188930en_US
dc.identifier.scopusauthoridZhou, MF=7403506005en_US
dc.identifier.scopusauthoridGriffin, WL=35229299300en_US
dc.identifier.scopusauthoridWang, L=49061465700en_US
dc.identifier.citeulike9776129-

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